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2 A wire is made out of a steel alloy with 11 2.00 10 Pa Y= and breaking stress 9 1.00 10Pa . The wire is 5m long and is secured at one end to the...

10.2 A wire is made out of a steel alloy with 11
2.00 10 Pa
Y= × and breaking stress
9
1.00 10Pa
× . The wire is 5m long and is secured at one end to the ceiling and hangs
vertically.

(a) A 10kg point mass is attached to one end, the wire elongates by 1cm. What is the
cross section area of the wire? What is the diameter of the wire (assuming the cross
section is circular)?

(b) What is the largest mass that can be supported on the end of the wire before it breaks?

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